div#photo {
  margin-top: 30px;
  height: 430px;
  background: url("../images/photo.jpg") no-repeat scroll center;
  .col-md-7 {
    position: absolute;
    top: 0px;
  }
}

div#features {
  div.col-md-4 {
    width: 30%;
  }
}

div#article{
  div.col-md-6{
    width:45%;
  }
}
div#download{
  div.col-md-6{
    width:49%;
  }
}